smith



0. SMITH.

2 Sheets-Sheet 1" DRILL PRESS.

(No Model.)

Patented Feb. 23,1886.

2 Sheets-Sheet 2.

0. SMITH. DRILL PRESS (No Model.)

Patented .Feb. 23, 1886.

UNITED STATES PATENT OFFICE.

OBERLIN SMITH, OF BRIDGETOX, NEIV JERSEY.

DRILL-PRESS.

SPECIFICATION forming part of Letters Patent No. 336,598, dated February 23 1886.

Application filed August 29, 1884.

To all whom it may concern:

Be it known that I, OBERLIN SMITH, of Bridgeton, in the county of Cumberland, and in the State of New Jersey, have invented certain new and useful Improvements in Drill- Presses; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompa nyiug drawings, in which-- Figure 1 is a perspective View of my drill head as arranged for use. Fig. 2 is a crosssection of the same upon a vertical axial line.

Fig. 3 is a side elevation, partly in vertical section, of the drill-head provided with back gearing and reversible gear. Fig. 4 is a section of the same upon line .2 w of Fig. 3; and Fig. 5 is a view from the upper end of one of the special spindles, and shows the arrangement of the reversible gearing.

Letters of like kind refer to like parts in each of the figures.

In the construction of machinery it is often necessary that one part should be successively operated upon by several drills of different sizes or shapes, or by drills followed by reamers, facing and countersinking tools, or screw- 1 taps; and, in order that accuracy may be secured, it is desirable that the article being 0perated upon should not be moved from position until each tool has been used. In such cases it has heretofore been necessary that each tool, when used, should be removed and replaced by the tool next in order, one spindle being employed for all. To obviate this difficulty, and to enable either of a number of drills or other like tools to be easily and quickly brought into one predetermined position for use is thedesign of my invention; to which end said invention consists, principally, as an improvement in drill-presses, in a head or turret which has journaled therein a number of special drill'spindles, and is in turn journaled upon an obliquely-arranged arm that is secured upon and moves with the end of an ordinary drill-spindle, whereby by the rotation of said head upon its journal either of said special drill-spindles may be brought into line axially with said ordinary drill-spindle, and then caused to engage with and be rotated by the same, substantially as and for the purpose hereinafter specified.

Serial No. 141,750. (X0 model.)

It consists, finally, in the special construction and combination of parts,substantially as and for the purpose hereinafter shown.

In the carrying into effect of my invention I journal upon the lower end of the spindle A of an ordinary drill -press a sleeve, B, from one side of which an arm, 1), extends radially outward and engages with a vertical guide that is formed upon or within the frame of said drill-press, the arrangement being such that said sleeve will move freely in a vertical direction with said spindle, but is prevented from rotating with the same. From a suitable point upon the sleeve B, preferably opposite to the arm I), a second arm, 1), projects obliquely downward and outward, and forms a journal-bearing for a head, C, that is adapted to rotate freely thereon. Said head has journaled at various points equidistant from the oblique axis a number of special drillspindles, D, each of which has such radial po sition and axial line with reference to the axis of said head as to enable it, by the rotation of the latter, to be brought directly beneath the spindle A and into a line axially with the same.

The lower end of the spindle A is provided with an axial opening, (1, preferably round,

- into which is fitted a corresponding]y-shaped metal bar, A, that is adapted to move longitudinally within certain limits, but by means of a dowel-pin. a, or other equivalent device, is prevented from rotating except with said spindle. -A spring, a", placed above said bar, holds the same with a yielding pressure at the lower limit of its motion. \Vithin the lower end of the bar A is provided a socket, a, which corresponds to and is adapted to fit over and engage with the upper end, (Z, of each of the spindles D as the same are brought into position beneath the spindle A, and thereby cause the rotary motion of the latter to be communicated to the former. The lower end of said socket-bar being beveled outward and upward, said bar will be automatically pressed upward by each of said spindles D when moved to place until the latter are in line axially with said spindle A, after which said socketbar will be returned to position by the spring a" and held in engagement with the said squar(d end (I.

By means of the mechanism shown a number of drills, reamers, taps, or other like tools are arranged so that either may be easily and quickly moved into or out of position for use without removal from its spindle or stock, and each tool, when in operation, is caused to occupy the exactaxial line of the main or drillpress spindle, so as to be capable of operating at the precise point upon the work at which each of the other tools has operated or may operate.

In cases where it is not desirable to make the head a permanent part of a drilLpress, but it is desired that it shall be adapted for use upon or in connection with any ordinary drillpress, the spindle A, immediately above said head, has a tapering shank, a, which enables it to be inserted within the lower end ofa drillspindle, precisely as in case of an ordinary drill or other tool.

In orderto permit of the use of tools having a considerable diameter, back gearing may be added to either or all of the spindles D, in which event each spindle thus provided is shortened, so as not to project to the upper end of its bearing O, and is journaled independently within the same. To the lower projecting end of said spindle is secured a gear-wheel, F, which meshes with and receives motion from a smaller gear-wheel, G, that is secured upon the lower end of a shaft, H, which shaft is journaled within the bearing 0 parallel with said spindle. The upper end of said shaft H carries a gearwheel, I, that meshes with and is driven bya smaller gear-wheel, K, which latter is journaled at the upper end of said bearing 0, and is engaged by and receives motion from the spring-bar A. As thus arranged the rotation of the main spindle will, through the gearwheels and shalt, be communicated to the supplemental drillspindle, and will cause the latter to have such relative velocity as may be desired, the same being regulated by the rel ative proportions of said gearing.

For use with screw-taps it may be desirable to have the motion of the supplemental spindle reversible, for which purpose the pinion K is made too small for engagement with the wheel I, and upon the axis of the former is pivoted a hook-shaped bar, L, that has journaled at one side of its pivotal bearing a pinion, M, and at the opposite side a pinion, N, which mesh with said pinion K. A third pinion, O, is journaled upon said bar beside said pin N, and meshes with the same.

If, now, the bar L is moved in one direction upon its pivotal bearing, the pinion M will be caused to mesh with the gear-wheel I and transmit to the same the motion of the pinion K, while by moving said bar in an opposite direction the pinion 0 will be engaged with said wheel I, and the motion of said pinion K will be transmitted thereto through said pinion O and the pinion N, by which means said wheel I will be caused to rotate in a direction opposite to that caused by the engagement therewith of said pinion M.

In applying the mechanism described to drilling-machines I do not limit myself to drill-presses proper, as it is equally adapted to machines having horizontal spindles, it being obvious that there is no difference in the principle of operation whatever the position of such spindle.

Having thus fully set forth the nature and merits of my invention, what I claim as new 1. As an improvement in drill-presses, a head or turret which has journaled therein a number of special drill-spindles, and is in turn journaled upon an obliquely-arranged arm that is secured upon and moves with the end of an ordinary drill-spindle, whereby by the rotation of said head upon its journal either of said special drill-spindles may be brought into line axially with said ordinary drillspindle, and then caused to engage with and be rotated by the same, substantially as and for the'purpose specified.

2. In combination with the spindle A, the sleeve B, journaled thereon and provided with the radial arm I) and oblique arm b, the head 0, journaled upon said arm I), and the special spindles D, journaled within said head at points equidistant from its center and in lines which are relatively oblique to its axis, substantially as and for the purpose shown.

3. In combination with the special spindles D of the obliquely-journaled head C,thespringactuated bar A, fitted to and adapted to move longitudinally within the lower end of the spindle A and to automatically engage with the upper end, d, of each of said spindles D, substantially as and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this 22d day of July, A. D. 1884. V

OBERLIN SMITH.

Witnesses:

JAMES J. Rnnvns, CHESTER J. BUCK. 

